病情危重、凶险的疟疾是
A．正疟B．温疟C．寒疟D．瘴疟
参考答案：D
Your performance in the exam isn’t that satisfactory. , you failed.
A．In a word
B．In other words
C．What’s worse
D．What a pity
把下列金属投入投入0.1mol/l的HCl中反应最快的是（ ）
A．Mg
B．Al
C．Fe
D．Cu
